| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 2Small sample | 100.0% (2/2) | 50.0% (1/2) | -0.2% | -0.2% | -1.7% |
| 20D | 2Small sample | 100.0% (2/2) | 50.0% (1/2) | +1.0% | +1.0% | -3.4% |
| 60D | 2Small sample | 100.0% (2/2) | 100.0% (2/2) | +5.0% | +5.0% | +4.6% |
| 120D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -8.8% | -8.8% | -8.8% |
COMPANY RESEARCH
BIG YELLOW GROUP PLC
BYG.L · United Kingdom · Real Estate · REIT—Industrial
INSIDER SIGNAL
Insider activity score：44.6 / 100
1 insiders · 1 purchase events · €39k net purchases
Europe #908 · United Kingdom #246
WHY THIS SIGNAL?
Score anatomy
Each bar shows the contribution to the current score; the weights and formula stay unchanged.
Cluster+10.5 / 35
How many distinct insiders bought in the cluster
Purchase size+17.2 / 25
Purchase value relative to company size and liquidity
Role+13.0 / 20
The seniority and relevance of participating insiders
Recency+0.0 / 10
How recently the purchases occurred
Conviction+10.0 / 10
How clearly buying stands out from other activity
What is holding the score back?
- ⚠ Buyer breadth is moderate · fewer than 4 distinct filers
- ⚠ Insider role contributes less on the current role scale
- ⚠ Purchase activity is becoming less recent
The role contribution uses the inverted role input of the current European model.
Buying concentration
100%
Largest buyer：Michael O'Donnell · 33k GBP
Gross qualified purchase transaction-line value：33k GBP
The headline € total is net buying for the screen; this module uses gross qualified purchase transaction-line values in the filing currency, so the amounts can differ. The current 15-day buyer-breadth input counts distinct buyers; value concentration is disclosed separately here.
This is a ranking under the current European screening rules—not a probability of gain, return forecast, or buy recommendation.
Key purchase quotes (filing currency)
| Filer | Price per unit | Trade date |
|---|---|---|
| Michael O'Donnell | 8.27398 GBP | May 19, 2026 |
Model details
Cluster breakdown (does not change the score)
- 15-day buyer breadth (count)
- 1 distinct reported filers
- Peak time window
- 2026-05-19 to 2026-05-19
- Current breadth input
- 0.300 (capped at 4+ buyers)
- Buyer independence
- Not yet measured; related-party fields are not cross-market comparable
What the filings show
- 🟢 Recent eligible purchase
Michael O'Donnell · 33k GBP · Price 8.27398 GBP · May 19, 2026 - 🔴 7 other transaction line(s) are not counted as discretionary-buying evidence; 0 have zero price
Insider vs stock price
No daily prices and volumes have been captured for this stock yet.
Insider timeline
One insider bought, once (19 May).
Tap an item for what it means.
●A purchase: the bigger the dot, the more was bought
Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.
▂Grey bars: companies across Europe disclosing purchases each week
A taller bar is a week in which more companies disclosed insider purchases.
This company: insiders buying per month, last 12 months
Nov
Dec
Jan
Feb
1Mar
Apr
1May
Jun
Jul
Aug
Sep
Oct
Darker bars are inside the 180-day window above.
Who traded
| Insider | Role | Purchases | Sales | Bought | First purchase | Share price since | Earlier purchases |
|---|---|---|---|---|---|---|---|
| Michael O'Donnell | Board member | 1 | — | 33.1k GBP | 2026-05-19 | — | fewer than 5 completed |
Why this score? · Model details
Priority = 100 × Σ(fixed weight × 0–1 rule-based input)
| Factor | Weight | This company input | Point contribution |
|---|---|---|---|
| 15-day buyer breadth (count) | 35% | 0.300 | 10.5 |
| Qualified-buy size | 25% | 0.686 | 17.2 |
| Role informativeness (inverted) | 20% | 0.350 | 7.0 |
| Recency | 10% | 0.000 | 0.0 |
| Buy/sell conviction | 10% | 1.000 | 10.0 |
This is a heuristic ordering under the current rules, not a calibrated return forecast. It explains why candidates rank differently; the public-filing evidence and data limits are shown below.
BULL VS BEAR
Two readings of this buying
The same filings, read two ways. Each line is a fact stored for this company with the number behind it, and appears only when that number crosses a fixed threshold. Neither side is a forecast and no winner is declared.
Since 2026-10-13, neither column has changed. All bull and bear lists, and what followed each line in the past →
Where the evidence comes from
- The insider purchases themselvesBearone buyer only, latest purchase is old4 checked, under the threshold · 3 missing
- Share price and tradingno data held
- Short sellers1 checked, under the threshold
- Company results2 missing
- Company actions1 checked, under the threshold · 1 missing
Bull case · the buying is informative
Nothing held here goes beyond the fact that an insider bought.
Bear case · discount it
- Only one insider bought. A single purchase can reflect that person's own finances rather than a view on the company.Record: after 4,732 earlier disclosures like this, the median 60-session excess return was −2.7%, within 1 percentage point of all comparable disclosures (−3.3%).
- The latest purchase was 151 days ago (2026-05-19). A reporting period has passed since, so what the buyers knew then may already be public.
Evidence still missing
- No buyer here has 5 or more completed earlier purchases on record, so there is no track record to weigh.
- The company's market value is not captured, so the purchases cannot be stated as a share of the business or of its trading volume.
- No earnings, margin or cash-flow figures are captured for this company. The latest annual and interim reports are where to check whether the business is improving or deteriorating.
- The next scheduled results are on 2026-11-16. They are the first hard test of either reading.
- European notifications have no field saying whether a purchase was pre-arranged; there is no counterpart to the US 10b5-1 box. The one purchase line does not mention a plan, but a bare “On 19 May 2026, Jane O'Donnell, spouse of Michael O'Donnell purchased 4,000 ordinary shares of the Company at…” does not rule one out.
- The filings give the size of each trade, not what the buyer already held. Whether a purchase added 1% to a personal stake or doubled it is not known.
Checked and under the threshold: 6
- Either1 insider bought in the last 180 days and 1 in the 180 days before. Bull when the number at least doubles and rises by two; bear when at least two bought before and no more buy now.
- Bear0 of 1 buyer filed as a person closely associated with a manager. Counted for the bear side from half.
- EitherNet purchases of €39k in 180 days. Bull from €1.0M, bear when all purchases total under €25k.
- BearNo insider sale is recorded in the same 180 days.
- BearThe register of FCA shows no published net short position in this company.
- BullThe company announced no transaction in its own shares in the last 30 days.
Both columns arrange stored facts only. They do not change the insider score or the ranking and are not investment advice.
Signal history
44.6 / 100
Latest recorded score
↑ +1.4 ptsversus the comparable snapshot on 2026-09-14 (34 calendar days apart)
- Recorded snapshots
- 35
- First snapshot
- 2026-08-26
Only scores captured when the scoring run completed are compared. These are raw signal scores saved when each full scoring run completed. They describe changes in research ranking, not price performance or returns.
Why did it change?
Decomposition across the five score factors between comparable snapshots; historical scores are not recalculated.
- Purchase size-5.5 pts
- Role-7.0 pts
Signal score history
Fixed 0–100 scale; dates are spaced by calendar time.
Recent recorded points
- 43.2
- 43.2
- 44.6
- 44.6
- 44.6
View all recorded scores
| Snapshot date | Signal score |
|---|---|
| 2026-08-26 | 43.2 |
| 2026-08-27 | 43.2 |
| 2026-08-28 | 43.2 |
| 2026-08-31 | 43.2 |
| 2026-09-01 | 43.2 |
| 2026-09-02 | 43.2 |
| 2026-09-03 | 43.2 |
| 2026-09-04 | 43.2 |
| 2026-09-07 | 43.2 |
| 2026-09-08 | 43.2 |
| 2026-09-09 | 43.2 |
| 2026-09-10 | 43.2 |
| 2026-09-11 | 43.2 |
| 2026-09-14 | 43.2 |
| 2026-09-23 | 44.6 |
| 2026-09-24 | 44.6 |
| 2026-09-25 | 44.6 |
| 2026-09-28 | 44.6 |
| 2026-09-29 | 44.6 |
| 2026-09-30 | 44.6 |
| 2026-10-01 | 44.6 |
| 2026-10-02 | 44.6 |
| 2026-10-03 | 44.6 |
| 2026-10-04 | 44.6 |
| 2026-10-05 | 44.6 |
| 2026-10-06 | 44.6 |
| 2026-10-07 | 44.6 |
| 2026-10-08 | 44.6 |
| 2026-10-09 | 44.6 |
| 2026-10-12 | 44.6 |
| 2026-10-13 | 44.6 |
| 2026-10-14 | 44.6 |
| 2026-10-15 | 44.6 |
| 2026-10-16 | 44.6 |
| 2026-10-18 | 44.6 |
Sector context
- Buying breadth
- 9.0% (32 / 354 issuers)
- Sector rank
- #5 / 12
- 7D breadth change
- -0.9 pp · vs 2026-10-12 (6d)
- 30D breadth change
- History building
This is sector-level research context. It does not affect the Insider Signal or ranking.
Insider profile outcomes
Historical performance following insider filings. The company role is translated below each name while preserving the original title.
- Excess return = stock return − FTSE 100 return over the same period.
- Hit rate = completed events with positive excess return ÷ total completed events.
- Price coverage = valid point-in-time prices ÷ events mature enough for that period.
- Returns start on the first shared trading session on or after publication.
- Small-sample rule: n<5 is shown for transparency and is not scored.
Events are disclosure-level observations; related disclosures published on the same date may share a return path and may not be statistically independent. This research enrichment does not affect the insider score or ranking.
| Period | Completed events | Price coverage | Hit rate | Median excess return | Average excess return | Worst excess return |
|---|---|---|---|---|---|---|
| 5D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -4.0% | -4.0% | -4.0% |
| 20D | 1Small sample | 100.0% (1/1) | 100.0% (1/1) | +0.6% | +0.6% | +0.6% |
| 60D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -6.4% | -6.4% | -6.4% |
| 120D | 1Small sample | 100.0% (1/1) | 0.0% (0/1) | -14.7% | -14.7% | -14.7% |
Market context
No price, valuation or fundamentals have been captured for this stock yet.
Disclosed net short positions
The FCA register, read 18 Oct 2026, publishes no aggregate net short position for this issuer.
Short-position disclosures are external context; they do not affect the insider score, ranking, or filing eligibility.
Insiders' buying price vs the latest close
No daily prices have been captured for this stock yet.
Buying size vs market trading
Complete price and volume history is not yet available.
Market-data coverage: 0 verified sessions · Latest session: — · Ratio status: Unavailable
Traded value is estimated as close × shares traded, in major currency units. Includes disclosed qualifying purchases; disclosures may lag. Contractual or planned acquisitions are not necessarily discretionary. Ratios describe relative trading size, not market participation or score contributions.
Latest news
No news has been captured for this company.
Regulatory filings
- Insider filing announcement · published 2026-07-21 · trade date 2026-07-21
- Insider filing announcement · published 2026-05-21 · trade date 2026-05-21
- Insider filing announcement · published 2026-05-19 · trade date 2026-05-19
Unfold all 4 filings
- Insider filing announcement · published 2026-07-21 · trade date 2026-07-21
- Insider filing announcement · published 2026-05-21 · trade date 2026-05-21
- Insider filing announcement · published 2026-05-19 · trade date 2026-05-19
- Insider filing announcement · published 2026-03-23 · trade date 2026-03-23
Filing evidence
These are underlying national-feed records from the 365-day window ending on the saved ranking snapshot. The score uses only the latest 180 days; older qualifying equity purchases remain visible for audit but do not enter the current score. The original filer, role, transaction classification, instrument, price, volume, value and source fields are retained. The first three rows are shown; remaining records can be unfolded for audit. Other transaction types are retained but excluded from the score.
Excluded transactions & classification
4 qualifying purchase disclosure(s) · 4 transaction line(s)
May 19, 2026On 19 May 2026, Jane O'Donnell, spouse of Michael O'Donnell purchased 4,000 ordinary shares of the Company at an average price of 827.398 pence per share. Following this transaction, Mr O'Donnell and his family's beneficial holding is 13,000 ordinary shares, representing 0.007% of the Company's issued share capital.
Michael O'Donnell · Non Executive Director
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 4000 shares × 8.27398 GBP · —
Open filingMar 23, 2026On 19 th March 2026, Nicholas Vetch sold 54,731 shares in the Company f rom his personal holding in the name of Byways Investments Company Limited at an average price of 913.56 pence per share. On 20 th March 2026, Mr Vetch purchased 2 1,816 shares i n the Company i nto his personal pension at an average price of 9 12.00 pence per share. On 23 rd March 2026 Mr Vetch purchased 32 ,915 shares in the Company i nto his personal pension at an average price of 8 46.00 pence per share. Following this transaction, Mr Vetch and his family's beneficial holding remains at 6,556,334 ordinary shares, representing 3.33% of the Company's issued share capital.
Nicholas Vetch · Executive Chairman
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 54731 shares × 9.1356 GBP · —
Open filingMar 23, 2026On 19 th March 2026, Nicholas Vetch sold 54,731 shares in the Company f rom his personal holding in the name of Byways Investments Company Limited at an average price of 913.56 pence per share. On 20 th March 2026, Mr Vetch purchased 2 1,816 shares i n the Company i nto his personal pension at an average price of 9 12.00 pence per share. On 23 rd March 2026 Mr Vetch purchased 32 ,915 shares in the Company i nto his personal pension at an average price of 8 46.00 pence per share. Following this transaction, Mr Vetch and his family's beneficial holding remains at 6,556,334 ordinary shares, representing 3.33% of the Company's issued share capital.
Nicholas Vetch · Executive Chairman
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 21816 shares × 9.12 GBP · —
Open filingUnfold all 1 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-03-23 | 2026-03-23 | Nicholas Vetch | Executive Chairman | On 19 th March 2026, Nicholas Vetch sold 54,731 shares in the Company f rom his personal holding in the name of Byways Investments Company Limited at an average price of 913.56 pence per share. On 20 th March 2026, Mr Vetch purchased 2 1,816 shares i n the Company i nto his personal pension at an average price of 9 12.00 pence per share. On 23 rd March 2026 Mr Vetch purchased 32 ,915 shares in the Company i nto his personal pension at an average price of 8 46.00 pence per share. Following this transaction, Mr Vetch and his family's beneficial holding remains at 6,556,334 ordinary shares, representing 3.33% of the Company's issued share capital. | Ordinary Shares of Big Yellow Group PLC (the "Company"). | 8.46 GBP | GBP | 32915 | Open filing |
Showing 4 of 4 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level € aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Other disclosed transactions · excluded from score
View 7 other transaction(s)
Jul 21, 2026In each case, on 21 July 2026 the Executive Directors/PDMRs were granted nil paid options over ordinary shares of 10 pence (the "Options") granted under the Company's Long Term Investment Plan. The Options are exercisable from 21 July 2029 to 20 July 2036, subject to performance criteria being met. Each of the messrs Vetch, Hunter and Trotman were granted the following Options: 1. Mr Vetch: 103,292 2. Mr Hunter: 108,016 3. Mr Trotman: 67,142 The performance conditions attributable to these Options are set out in the Remuneration Report in the Group's 31 March 2026 Annual Report.
Nicholas Vetch · Executive Chairman
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 103292 shares × — · —
Open filingJul 21, 2026In each case, on 21 July 2026 the Executive Directors/PDMRs were granted nil paid options over ordinary shares of 10 pence (the "Options") granted under the Company's Long Term Investment Plan. The Options are exercisable from 21 July 2029 to 20 July 2036, subject to performance criteria being met. Each of the messrs Vetch, Hunter and Trotman were granted the following Options: 1. Mr Vetch: 103,292 2. Mr Hunter: 108,016 3. Mr Trotman: 67,142 The performance conditions attributable to these Options are set out in the Remuneration Report in the Group's 31 March 2026 Annual Report.
John Hunter · Chief Executive Officer
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 108016 shares × — · —
Open filingJul 21, 2026In each case, on 21 July 2026 the Executive Directors/PDMRs were granted nil paid options over ordinary shares of 10 pence (the "Options") granted under the Company's Long Term Investment Plan. The Options are exercisable from 21 July 2029 to 20 July 2036, subject to performance criteria being met. Each of the messrs Vetch, Hunter and Trotman were granted the following Options: 1. Mr Vetch: 103,292 2. Mr Hunter: 108,016 3. Mr Trotman: 67,142 The performance conditions attributable to these Options are set out in the Remuneration Report in the Group's 31 March 2026 Annual Report.
John Trotman · Chief Financial Officer
Ordinary Shares of Big Yellow Group PLC (the "Company"). · 67142 shares × — · —
Open filingUnfold all 4 remaining filing row(s)
| Transaction date | Published | Filer | Role | Transaction | Instrument | Price (local currency) | Quote currency | Volume | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-05-21 | 2026-05-21 | Nicholas Vetch | Executive Chairman | In each case, on 21 May 2026 the Executive Directors were granted nil cost options over ordinary shares of 10 pence (the "Options") under the Big Yellow Deferred Bonus Share Plan 2018. The Options are exercisable from 21 May 2026 to 26 May 2035. Each of the messrs Vetch, Gibson and Trotman were granted the following Options: 1. Mr Vetch: 36,475 2. Mr Gibson: 42,796 3. Mr Trotman: 31,612 4. Mr Hunter 31,612 | Ordinary Shares of 10 pence each in Big Yellow Group PLC (the "Company"). | — | GBP | 36475 | Open filing |
| 2026-05-21 | 2026-05-21 | James Gibson | Chief Executive Officer | In each case, on 21 May 2026 the Executive Directors were granted nil cost options over ordinary shares of 10 pence (the "Options") under the Big Yellow Deferred Bonus Share Plan 2018. The Options are exercisable from 21 May 2026 to 26 May 2035. Each of the messrs Vetch, Gibson and Trotman were granted the following Options: 1. Mr Vetch: 36,475 2. Mr Gibson: 42,796 3. Mr Trotman: 31,612 4. Mr Hunter 31,612 | Ordinary Shares of 10 pence each in Big Yellow Group PLC (the "Company"). | — | GBP | 42796 | Open filing |
| 2026-05-21 | 2026-05-21 | John Trotman | Chief Financial Officer | In each case, on 21 May 2026 the Executive Directors were granted nil cost options over ordinary shares of 10 pence (the "Options") under the Big Yellow Deferred Bonus Share Plan 2018. The Options are exercisable from 21 May 2026 to 26 May 2035. Each of the messrs Vetch, Gibson and Trotman were granted the following Options: 1. Mr Vetch: 36,475 2. Mr Gibson: 42,796 3. Mr Trotman: 31,612 4. Mr Hunter 31,612 | Ordinary Shares of 10 pence each in Big Yellow Group PLC (the "Company"). | — | GBP | 31612 | Open filing |
| 2026-05-21 | 2026-05-21 | John Hunter | Chief Operating Officer | In each case, on 21 May 2026 the Executive Directors were granted nil cost options over ordinary shares of 10 pence (the "Options") under the Big Yellow Deferred Bonus Share Plan 2018. The Options are exercisable from 21 May 2026 to 26 May 2035. Each of the messrs Vetch, Gibson and Trotman were granted the following Options: 1. Mr Vetch: 36,475 2. Mr Gibson: 42,796 3. Mr Trotman: 31,612 4. Mr Hunter 31,612 | Ordinary Shares of 10 pence each in Big Yellow Group PLC (the "Company"). | — | GBP | 31612 | Open filing |
Showing 7 of 7 matching raw-feed row(s) from the current 365-day research window. Prices and reported values remain in the filing currency and its major unit (for example, UK pence are parsed as GBP). The screen-level € aggregate is separately FX-normalised for research ranking, not a trade-date conversion.
Snapshot & identity
- Snapshot date
- 2026-10-18
- Ticker
- BYG.L
- ISIN
- —
- Sector
- Real Estate
- Industry
- REIT—Industrial